radiator fan

5valve

Im into mounting a fan on the radiator and if someone already did this, I only wonder of the best location to attach it
since all single fan bikes use it on the left raditator, this probably means its the hotter of the two
so the upper, middle or the lower end of it?
mostly I ve seen bikes in the middle and lower position

is there any aftermarkt or oem kit wich would represent the best mount location?

Brettv

not too sure about location, but ive heard dc computer fans will work, ill be doing this mod soon i think, cause i have unabiker rad guards, theres really only space left in the middle to mount it, so ill prob put it there.
let us know how you go
cheers - Brett

blooozboy

5valve

Im into using a computer 12vdc fanmade housing fo it and dressed it in antivibro bicycle inner tube I too found some info on TT, guys use it with no problems, even in wetter conditions Ill probably make it easy detachable, because pressure cleaner is probably no friend of delicate electric innards

since I dont have battery (wr400), ill attach it to the wires of removed horn and controll it through horn button

5valve

One thing that's puzzling me- you say you don't have a battery. Is your lighting circuit rectified? The 12v DC fan won't work on AC.

I just managed to connect the fan, first to the battery charger to check functionality and than to the ex-horn wires on the bike and it worked normal when I pressed the horn button engine, naturally, has to run fan is 12V DC without a doubt

ADD:------------------------------------------------------afer installing home maderad guards and completing installation to the bike, I noticed, that left rad is useless for fan mount, since it has a water tube fitted on top middle and is lined towards the cylinder, so no place for fan can be obtained. However, I should probaby manage to squeeze it somewhere behind the right one.

I think KTM's have coolant cap on the left rad and probably that means its the hotter one, so since yama has it on the right, it should be just fine for the fan.

5valve

Hamish

when I installed my GPS on my Wr426, I simply used a cheap bridge rectifier to get 12vdc. The AC is regulated already, so u just need to rectify it. The bottom of the top tripple clamp works as a good heatsink.